A brutal thrall represents any type of humanoid converted by some means into a construct. This means may be magical, psionic, a creature ability, or even technological. The construct itself is fairly limited, acting on up-to five commands.

Death Trigger (Sp): When these creatures die, some type of spell, power, or other effect of 2nd level or lower activates, Caster Level 4, attribute 16. Save DC is 13 + Spell/Power Level.

For example, a psionic brutal thrall has the death trigger inflict pain, DC 15, range 35 feet. The effect targets either the character who destroys it or that character's direction. This effect is caused by the destroyed control device overloading. "You telepathically stab the mind of your foe, causing horrible agony. The subject suffers wracking pain that imposes a –4 penalty on attack rolls, skill checks, and ability checks. If the target makes its save, it takes only a –2 penalty." (SRD)